Some researchers believe that there is no doubt ____ a cure for AIDS will be found.
#81173
A
which
B
that
C
what
D
whether
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So fast ________ that I could not catch up with them.
#81143
A
did they run
B
they had run
C
they ran
D
had they run
Not until he got to the factory _______that he had lost his papers.
#83272
A
he found
B
did he find
C
had he found
D
has he found
Smith was overweight,so the doctor urged that not only_______have less fat and meat,but also he_______.
#84158
A
should he;take exercise
B
must he;takes exercises
C
he can;does some exercises
D
he ought to;do some practice
Only by imagining and creating ____the problem.
#81688
A
can solve
B
you can solve
C
solve
D
can you solve
So sudden an attack ________ that the enemy could hardly have any time to fly for their lives.
#79597
A
we made
B
we had made
C
did we made
D
had we made