The scientist has made quite a few discoveries, ______ of great importance to the whole world.
#95024
A
which I think they are
B
which I think are
C
I think which are
D
that I think they are
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______ unless I call you. 
#94749
A
Please come
B
Not come in
C
Don’t come in
D
Come in
She can't help _____ the house because she's busy making a cake.
#94713
A
to clean
B
cleaning
C
cleaned
D
being cleaned
 The young man spent as much time as he ______ over his lessons.
#94776
A
went
B
can go
C
could going
D
could to go
She was grateful _____ George _____ all _____he had done.
#92112
A
to; for; that
B
to; for; what
C
for; to; that
D
for; to; what