----May I open the win
dow to let in some fresh air?
----
A. come on! B Take care! C Go ahead! D Hold on
Water _____ at 100 degrees centigrade.
| A．boiled | B．boils | C．has boiled | D．was boiling |
–English has large vocabulary, hasn’t it?
–Yes, _____ more words and expressions and you will find it easier to read and communicate.
| A．Know | B．Knowing | C．To know | D．Known |
The first use of atomic weapons was in 1945. and their power _____ increased enormously ever since.
| A．is | B．was | C．has been | D．had been |
I thought Jim would say something about his school report, but he _____ it.
| A．doesn’t mention | B．hadn’t mentioned |
| C．didn’t mention | D．hasn’t mentioned |
I feel it is your husband who _____ for the spoiled child.
| A．is to blame | B．is going to blame |
| C．is to be blamed | D．should blame |