The boy was doing homework while his mother      dinner.
#40660
A
cooks
B
cooked
C
was cooking
D
will cook
推荐题目
Robots         the house for us in the future.
#41540
A
clean
B
cleaned
C
will clean
D
/
I ______ some bread and milk______ breakfast this morning.
#39676
A
have; for
B
had; for
C
has, with
D
had; with
—Do you plan to take a vacation this month?—Yes, we ________ to Hainan and _______ there for five days.
#40277
A
go, stay
B
going, staying
C
are going, stay
D
are going, staying