—Could I look at your picture?
—Yes，of course you________．
| A．could |
| B．can |
| C．will |
| D．must |
There is no _____ that phones play an important role in the modern life.
A.question B. doubt C. problem
There ______ more new buildings in my hometown in two years .
A. are B. will haveC. will be
The little boy is healthy, _____ he is happy, too.
A.and B. but C.or
The meeting for two hours.
A. has begun B. has been onC. began
Teachers should _____ their students to practice _____ English often.
A.encourage; speaking B.let; speak C.keep; speak