Mr. Green is said _____ an experiment to prove the new method of solving the problem when young.
#98925
A
to do
B
to have done
C
to be doing
D
to have been doing
推荐题目
I'll have you ______ English in six months . 
#98544
A
speaking
B
speak
C
spoken
D
be able to speak
Better _____ all the lights are turned off before you leave the classroom.
#97559
A
to be sure
B
to make sure
C
be sure
D
make sure
.Nancy isn’t here. It’s my fault, I forgot all about ______ her.
#97019
A
to telephone
B
telephoning
C
to telephone to
D
telephoning by
The company promised to pay some money for the customers __ ___ their shoddy(伪劣的)goods and ______ an apology in public.
#95691
A
purchasing ; making
B
purchasing; make
C
purchased; to make
D
to purchase; made