Why didn't you go to the speech yesterday afternoon，Tim？
I'm so sorry．But I ______ my homework．（ ）
A．have doneB．was doingC．will doD．am doing
On our farm, the tea leaves ________ by hand when they are ready.
| A． |
pick |
B． |
picked |
C． |
are picked |
D． |
were picked |
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 |