He was just falling asleep _____ there was a loud knock on the door.
#56552
A
while
B
when
C
then
D
until
推荐题目
They were walking ________ a forest after they swam _______ the river .
#57029
A
through, cross
B
across ,through
C
through, across
D
across, across
— What’s your new math teacher like?— Oh, he is very kind, ________ he looks serious.
#56022
A
though
B
because
C
if
D
and
“Show me your ticket, ________ I won’t let you in.” the guard(保安) said angrily.
#56497
A
so
B
or
C
but
D
and
