His name was on the _____ of my tongue, but I just couldn't recall it.
| A．end | B．point | C．edge | D．tip |
The principle of the heating system in this building is that pipes ________ hot water from the boiler to every part of it.
| A．consume | B．conduct | C．transmit | D．convey |
People’s working efficiency usually decreases more or less when the temperature _________ 35℃ or even higher.
| A．approaches | B．raises | C．draws | D．drops |
It is widely accepted reported in the western media that the drug ______ is now becoming a leading cause of teenager crimes.
| A．adoption | B．abuse | C．appreciation | D．appeal |
“Boys and girls, you are asked to submit a(n) _______ of about 100 words of the lecture given by Professor Yu tomorrow” , said the teacher.
| A．impression | B．report | C．abstract | D．conclusion |
The windows _____, so you need not wash it again.
| A．is washed | B．was washed | C．have been washed | D．will be washed |