—— What are you doing?   —— I _____  a letter to my pen pal.
#41497
A
write
B
am writing
C
writes
D
am write
推荐题目
---How did the accident happen? ---You know, it ________difficult to see the road clearly because it_________. 
#38358
A
was; was raining
B
is; has rained
C
is; is raining
D
will be; will rain
What_____ you _____at eight yesterday evening?
#39816
A
have, done
B
did, do
C
were , doing
D
are, doing
Yesterday, the teacher told us that the earth ________around the sun.
#39834
A
moved
B
moves
C
was moving
D
had moved