Where to find the teacher and where to do the experiment ______.
A: are not known
B: is not known
C: has not known
D: have not known
A: are not known
B: is not known
C: has not known
D: have not known
A
举一反三
- If only I where he lives. A: knew B: have known C: know D: had known
- I have known her for a long time. / She........................ to me for a long time. A: has known B: has been known C: is known
- Little ______ when I took the trip where it would lead me. A: have I known B: had I known C: do I know D: did I know
- Where Janet will go / is not known yet.
- It is known to us ___ where there is pollution, there is harm.
内容
- 0
They ___________(know) each other for about ten years. A: knew B: has known C: have known D: has knew
- 1
They kept trying ________ they must have known it was hopeless. A: If B: because C: when D: where
- 2
I my best friend for twenty years. A: knew B: have knew C: have known D: has known
- 3
My cat would not have bitten the toy fish, ___ it was made of rubber. A: if she has known B: she should have known C: if she knew D: had she known
- 4
My cat would not have bitten the toy fish ( ) it was made of rubber. A: if she has known B: if she had known C: she should have known D: if she knew