_ we were walking along the river, we heard a cry for help.
#55724
A
While
B
Until
C
After
D
Before
推荐题目
I enjoyed your lecture very much, ______ there were some parts I couldn’t quite understand.
#55770
A
because
B
unless
C
after
D
though
______hours do you exercise every week ? Nine hours.
#56316
A
How many
B
How often
C
How much
D
How long
We had to wait half an hour we had already booked(预定) a table.
#56455
A
since
B
although
C
until
D
before
