I study math by ____ lots of exercises.
#49928
A
did
B
doing
C
do
D
does
推荐题目
—Would you like camping with me? — I’d like to. But I’m busy my homework.
#48529
A
to go; to do
B
to go; doing
C
going; to do
D
going; going
I’m glad___________.
#50315
A
hear from you
B
to hear from you
C
hear a letter from you
D
to hear a letter from you