His laziness ___________ his failing in the exam.
| A．result from | B．accounts for | C．because of | D．is on account of |
—Sometimes I am even sleepy in class.
—It’s terrible. You _____ as well go to bed earlier.
| A．should | B．will | C．might | D．can |
The problem lies in______ we’re now giving him a fish, not teaching him how to fish.
| A．what | B．that | C．which | D．if |
It’ll be another 50 years _________ China is expected to reach the level of a medium developed country.
| A．since | B．before | C．that | D．when |
—Can you guide the new comer to the post office now?
—________, if he is ready.
| A．By all means | B．In no case | C．My pleasure | D．No way |
—Our uncle will be here to attend a meeting tomorrow, you know?
—Oh, I thought that he _____ today.
| A．is coming | B．comes | C．was coming | D．will come |