Relative clauses and complex sentences：练习题

Complete the sentence using the most appropriate modal verb to express a deduction about a past event with near certainty:

The streets are soaking wet this morning; it __________ heavily during the night.

Choose the correct inversion structure:
__________ did I realize that I had left my keys inside the locked office.

Which of the following sentences demonstrates the correct use of a future perfect continuous aspect to describe an ongoing action up to a point in the future?

Which of the following sentences correctly uses a participle phrase to express a reason?

Identify the sentence that correctly employs a result clause introduced by 'such... that'.

Choose the correct word to complete the subjunctive mood construction:
“It is essential that every student __________ a valid ID card to enter the examination hall.”

Convert the following sentence into a cleft sentence to emphasize the 'location':
“The secret meeting took place in the abandoned warehouse.”

Transform the following sentence using a 'nominal relative clause' as the subject:
“The thing that surprised the scientists most was the unexpected resilience of the bacteria.”

Combine the following pairs of sentences into a single sentence using a relative clause. Do not use 'which' or 'who'.

(a) The professor is world-renowned. I am taking his course this semester.
(b) The restaurant has just reopened. We had our first date there.

The subjunctive mood is often used to express hypothetical situations or formal recommendations. Rewrite the following sentences as instructed:

(a) I am not the manager, so I cannot approve your request. (Rewrite using a conditional structure starting with 'If I...')
(b) The board of directors thinks it is very important for the CEO to resign immediately. (Rewrite using the word 'insist' and the subjunctive mood.)
(c) It is a pity that he didn't study harder for the exam. (Rewrite using 'wish'.)