________, it began to rain unexpectedly.
#68281
A
While cleaning the machine
B
To clean the machine
C
He was cleaning the machine
D
While he was cleaning the machine
推荐题目
Can you make sure ______the gold ring?
#72721
A
where Alice had put
B
where had Alice put
C
where Alice has put
D
where has Alice put
We’ll have to finish the job, _________.
#69693
A
long it takes however
B
it takes however long
C
long however it takes
D
however long it takes