---- Pity you missed the lecture on nuclear pollution.
---- I _________ it, but was busy preparing for a job interview.

I wrote a letter to John for his help during my high school years. without which I  the college entrance exam.

The new law states that people _________ drive after drinking alcohol.

Some aspects(方面) of a teacher’s job ______ be tiring, and teachers often ______ work at inconvenient hours.

You       trust an online shop just because it has a beautifully-designed website.

He is not native, if he were, we _______ this discussion over his identity.

We apologize for any inconvenience you _______ have been caused by the delay of the flight.

It’ s suggested by experts that teenagers ____at least 30 minutes exercising, five times a week.

If we _______ adequate preparations, the conference wouldn’t have been so successful.

The general demanded that the soldiers _____ at the village before 5p.m. to rescue the victims of the earthquake.