He prevented his son from ________ it.
[
]|
A ．doing |
B ．to do |
|
C ．do |
D ．did |
Don't play ________ fire.
[
]|
A ．on |
B ．at |
|
C ．about |
D ．with |
We want to ________ so as to serve our country better in the future.
[
]|
A ．keep fit |
B ．keep silent |
|
C ．keep peace |
D ．keep smiling |
The teacher came in while Ann ________ her purse in the classroom.
[
]|
A ．was looking for |
B ．was finding |
|
C ．was finding out |
D ．was seeing |
--Dad, will you buy me a new bike?
--I don't know. I'll have to ________ it.
[
]|
A ．think of |
B ．think about |
|
C ．think for |
D ．think out |
The earth is our home. We must ________ it clean.
[
]|
A ．change |
B ．sweep |
|
C ．keep |
D ．build |