Suspecting the traveler of carrying drugs, the Customs official stopped him and ______ suitcase, but found nothing at all.
| A．looked up | B．went through | C．searched for | D． referred to |
The singer and________dancer is said to perform in our school on________May Day.
| A．the; 不填 | B．a；不填 |
| C．不填； the | D．不填； 不填 |
—Could we go and visit the Summer Palace?
—Yes，________.This should be on our list of things to do in Beijing.
| A．a pleasure | B．it depends |
| C．don't mention it | D．by all means |
It's OK to________an electrical appliance on so long as you are using it.
| A．leave | B．make |
| C．turn | D．open |
It________heavily for 2 weeks and the farmers were very worried.
| A．has been raining | B．had been raining |
| C．has rained | D．had been rained |
You cannot tell________looking at someone whether or not he has HIV.
| A．without | B．by |
| C．for | D．with |