—Iwonder why he has been acting so strange these days．
—Recent pressure at work may his behavior．
| A．account for | B．make for | C．change for | D．stand for |
____ the crisis of economy getting more and more serious, the government is searching for ways to improve people’s life.
| A．As | B．With | C．While | D．If |
--Do remember to charge the battery for 12 hours when you first use it.
--- ________.
| A．Thank you, I remember. | B．What for? |
| C．Up to you. | D．Got it. |
We’d be very grateful if you could join us because your cooperation will _____ the timely completion of our project.
| A．reach for | B．make for | C．go for | D．stand for |
My mobile phone disappeared. Where _____ I have left it?
| A．may | B．must | C．could | D．should |
My brother is always on medicine, so he has ___ table tennis to keep fit.
| A．taken up | B．built up | C．made up | D．held up |