.
He left without a word as if _______.
A, never to teturn B. never returning
C.he had never returned D.he would never be returning
---Is it good to look up every new word when I come across it in reading?
---No. You ______because you are likely to guess the meaning from the context.
A. can’t B. mustn’t C. don’t have to C. ought not to
—Shall we go out for______ meal this evening?
—Yes，that’s_____ good idea．
| A．a：a | B．a；the | C．the；a | D．the；the |
I don't know if you noticed their behaviors or not, but we______.
| A．were | B． have | C． had | D． did |
Here is the tower, ______ top you can have a good view of the whole city.
| A．from whose | B．from its | C．over whose | D．whose |
People in industrial countries take in as they actually need every day.
| A．twice as much protein | B．protein as much twice |
| C．twice protein as much | D．protein as twice as much |