E-mail, as well as telephones, _______an important part in our daily communication.
| A．play | B．have played | C．are playing | D．is playing |
It was ____surprise that my first teacher, already 90, was still living and in _____ good health.
A the, a B ∕, a C a, ∕ D a, the
. _____ number of students in each class is on_____ decrease.
A The, a B The, the C A, the D A, a
– Really? Who will give_____ lecture? What is it about?
--- Professor Chen,_____ president of Beijing University. About pollution.
A the, a B the, ∕ C a, the D a, ∕
If he comes early than____ appointed time, so much____ better.
A a, the B the, a C a, a D the, the
Separated from his parents at_____ early age, the left-behind boy in this rural town had ____ very difficult life.
A the, ∕ B an, a C a, the D∕ ,a