We must find out the professor is coming， so we can book a room for him．（ ）
A．howB．whyC．whenD．where
Jim _________ a lot about Chinese culture since he began to study in our school.
| A． |
learns |
B． |
learned |
C． |
will learn |
D． |
has learned |
I ________ about my sister when my phone rang. It was her!
| A． |
think |
B． |
will think |
C． |
was thinking |
D． |
am thinking |
Don’t lose heart. If you keep working hard, you _________ some day.
| A． |
will succeed |
B． |
succeed |
C． |
succeeded |
D． |
have succeeded |
The workers _________ the community center now.
| A． |
cleaned |
B． |
were cleaning |
C． |
will clean |
D． |
are cleaning |
Mr. Smith has helped me a lot, _________ I’m thankful to him.
| A． |
or |
B． |
but |
C． |
for |
D． |
so |