If Clause

Explanation
The correct answer is "hadn't been approaching" or "had not been approaching". This is because the sentence is in the past tense and is referring to an action that happened before another past action. The word "approach" is the correct verb form to use in this context, and the negative form "hadn't been" or "had not been" indicates that the boat was not in the process of approaching the quayside when it sank.

Explanation
The correct answer is "would call" because it suggests a hypothetical or imagined situation in the past. The brother is expressing a desire for his girlfriend to call him, but it hasn't happened yet. The use of "would" indicates a conditional or unreal situation.

Explanation
The correct answer is "could ride" because it is the past tense form of the modal verb "can" which is used to express ability or possibility. In this sentence, "could ride" indicates that Sibel had the ability or possibility to ride the horses with her friends, but she was unable to do so because she is too young.

Explanation
The sentence is in the conditional form, expressing a hypothetical situation. The verb "like" is used in the past tense "would like" to indicate a desire or preference for visiting the cousin in Australia. The phrase "if I can get three weeks off work" further emphasizes the condition that needs to be fulfilled for the visit to happen.

Explanation
This sentence is in the second conditional form, which is used to talk about hypothetical or unreal situations. The phrase "I don't believe that Susan really wants to lose weight" suggests doubt about Susan's desire to lose weight. The second part of the sentence "otherwise, she would exercise vigorously every day" implies that if Susan truly wanted to lose weight, she would be exercising vigorously every day. Therefore, the correct answer is "would exercise."

Explanation
The correct answer is "had hit". This is because the sentence is in the past tense and the use of "had" indicates that the action of the hurricane hitting the place occurred before the speaker entered the teenager's bedroom.

Explanation
The correct answer is "were" because the sentence is in the past tense and Sheila's actions of trying to please Jim all night indicate that she treated him as the only guest at her party. The verb "were" is the past tense form of the verb "be" and agrees with the subject "he."

Explanation
The correct answer is "were." This is because the verb "be" should be in the past tense to match the past tense of the sentence. The speaker is referring to a past event where the person being spoken to ignored them, so "were" is the correct form of the verb in this context.

Explanation
The sentence is expressing regret or disappointment about not revising for exams in the past. The correct answer "should have revised" is in the past tense and indicates that the action of revising should have been done but was not. This failure to revise has resulted in the person failing their degree and negatively impacting their chances of getting a good job.

Explanation
The correct answer is "would chew" because the phrase "I wish you" indicates a hypothetical or unreal situation. In this case, the speaker is expressing a desire for the person to chew their gum less vigorously. The verb "would chew" is used to indicate a hypothetical action that the speaker wishes the person would do.