____the problem of land erosion(侵蚀) getting more serious, the government is searching for a way to deal with it.
| A．As | B．When | C．With | D．If |
—Do you rememberhe came?
—Yes, of course. He came by train.
| A．that | B．when | C．where | D．how |
Although my parents are very busy, they still ______ a lot of time to us.
| A．offer | B．devote | C．spend | D．provide |
Remember ______ the book when you have finished it.
| A．putting back | B．having put back | C．to put back | D．to have put back |
I need one more stamp before my collection______.
| A．is completed | B．completes | C．has been completed | D．has completed |
Is there a shop around ______ I can get some stamps and envelops?
| A．which | B．where | C．that | D．how |