—Dad, when shall we go to visit my grandpa?—Grandpa is very busy at present．We'll go to see him whenever __________.
#93047
A
he is convenient
B
he will be convenient
C
it is convenient to him
D
it will be convenient to him
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private cars are bringing us convenience, they may also cause traffic accidents and pollution.
#93055
A
When
B
Since
C
while
D
As
----He is fluent in English because he once stayed in London ． ---- Really ? How long _________ there ?
#93107
A
did he live
B
has he lived
C
had he lived
D
does he live
This is the first time that I face to face with the president.
#92705
A
had come
B
have come
C
came
D
come
I ________ thank you too much for all your help to my son while we were away from home.
#92716
A
won’t
B
can
C
can’t
D
will