John does important research _______ the best ways to help the old.
#48571
A
finds
B
finds
C
found
D
to find out
推荐题目
_______ after supper _______ good for your health.
#50756
A
Walking, is
B
Walking, are
C
Walk, is
D
Walk, are
— Do you know why he left so early?—_______for the English test, I guess.
#51187
A
To study
B
Study
C
Studied
D
Studying
The purpose of new inventions is to make life easier, it more difficult.
#48658
A
not make
B
not making
C
not to make
D
do not make
---I am sorry to have kept you ___________.---It doesn't matter. I've just come.
#49688
A
wait
B
waited
C
waiting
D
to wait