—How long ____ you ____ in Singapore?
—For just the weekend． I’ll be back next Monday morning．
| A．have; stayed | B．are; staying | C．did; stay | D．do; stay |
.
.He once studied in Zhejiang University, ________he went abroad for further study.
| A．after which | B．where | C．in which | D．which |
.
.More attention should be paid __________ English.
| A．to speak | B．for spoken | C．of speaking | D．to speaking |
.
.More than 60 million people in southwestern China ________the drought nowadays as a result of less rainfall, environmental damage and so on
| A．are affecting | B．are being affected by | C．are being effected by | D．are effecting |
.
Please don’t do anything harmful ________ our nature, or we humans will have no ________ each other.
| A．to, fun about | B．for, fun with | C．for, fun about | D．to, fun with |
.
.What you said just now ________me of that American professor.
| A．mentioned | B．informed | C．reminded | D．memorized |