I felt that it had been a mistake to write to him.
A.I regretted having written to him.
B.There was a mistake in the letter I wrote to him.
C.I felt like making a mistake to write to him.
D.I made a few mistakes when I wrote to him.

The situation was so embarrassing that she did not know what to do.
A.It was such an embarrassing situation; however, she did not know what to do.
B.So embarrassing was the situation that she did not know what to do.
C.So embarrassing the situation was that she did not know what to do.
D.She did not know what to do, though it was not an embarrassing situation.

Our opinions on the subject are identical.
A.There’s some difference in our opinions on the subject.
B.We differ in opinions on the subject.
C.We have the same opinions on the subject.
D.We are identical.

Nhung has been typing the report for an hour.
A.It took Nhung an hour to type the report.
B.Nhung finished the report an hour ago.
C.It is an hour since Nhung started typing the report.
D.Nhung will finish typing the report in an hour.

The film was so boring that I fell asleep.
A.The film was interesting enough, but I fell asleep.
B.I did not fall asleep even though the film was boring.
C.I fell asleep because the film was boring.
D.The film was too long for me to watch.

I regret not booking the seats in advance.
A.I wish I booked the seats in advance.
B.I wish I have booked the seats in advance.
C.If only I booked the seats in advance.
D.If only I had booked the seats in advance.

He went down with flu as soon as he recovered from bronchitis.
A.He caught flu just before he recovered from bronchitis.
B.No sooner had he recovered from bronchitis than he went down with flu.
C.He recovered from bronchitis soon after he went down with flu.
D.He caught flu and bronchitis at the same time.

It won't be long before her husband comes back.
A.Her husband will come back later than planned.
B.Her husband will be returning quite soon.
C.There’s likelihood that her husband won’t return soon.
D.Possibly, her husband won’t come back as soon as he wants.

Workers are not allowed to use the office phone for personal calls.
A.They don’t let workers use the office phone.
B.The office phone is supposed to be used by worker only.
C.They don’t allow workers to make phone call personally.
D.Workers are not permitted to use the office phone for personal purpose.

I might have taken French last semester if I’d known it was offered.
A.Someone offered to teach me French last semester.
B.I knew that French was not offered last semester.
C.I didn’t take French last semester.
D.I took French the last semester it was offered.