It was not until she arrived home ________ she remembered her appointment with the doctor.
A. when
B. that
C. while
D. as soon as
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________ they will go there to try another experiment hasn’t been decided yet.
A. Whether
B. If
C. About whether
D. Why
If the ancient people had not learned to make use of fire, they ________ the advanced civilization.
A. will not create
B. shall not create
C. would not have created
D. should not have created
He asks that he ________ an opportunity to try this method.
A. is given
B. be given
C. were given
D. gave
It was ________ that we were very tired when we got there.
A. such long trip
B. such long a travel
C. so long travelling
D. so long a trip