If carefully, the experiment will be successful.
#83105
A
do
B
does
C
done
D
doing
推荐题目
The old couple have been married for 40 years and never once ______ with eachOther.
#81319
A
they had quarreled
B
they have quarreled
C
have they quarreled
D
had they quarreled
Only after Mary read her composition the second time _________ the spelling mistake.
#81405
A
she noticed
B
she has noticed
C
did she notice
D
does she notice
While ________ to foreigners，you must try your best to make yourself ________.
#81334
A
spoken…understood
B
spoken…understand
C
speaking…understood
D
speaking…understand
____under the tree was a charming girl aged about seventeen or eighteen.
#80191
A
Sat
B
Sitting
C
To sit
D
Sit