Instead of sending e-mail, Nancy talks with her mother on mobile phone once a week.
| A．the; a | B．an; the | C．an; / | D．the; an |
—Do you know where David is? I couldn't find him anywhere.
—Well, he ______ have gone far—his coat's still here.
| A．shouldn't | B．mustn't | C．can't | D．wouldn't |
She is getting better, but it will be some time ______ she is completely well.
| A．that | B．since | C．when | D．Before |
The computer centre, ______ last year, is very popular among the students in this school.
| A．open | B．opening |
| C．having opened | D．Opened |
______ in thought, he almost ran into the car in front of him.
| A．Losing | B．Having lost |
| C．Lost | D．To lose |
—What did your parents think about your decision?
—They always let me do ______ I think I should.
| A．when | B．that | C．how | D．What |