I wrote to my parents once a week,____ I was too busy with my teaching work.
#80142
A
it
B
unless
C
when
D
as
推荐题目
The museum will open in the spring with an exhibition and a viewing platform ___visitors can watch the big glasshouses being built.
#31051
A
what
B
where
C
when
D
why
We were swimming in the lake _______ suddenly it began to rain heavily.
#30962
A
when
B
while
C
until
D
before
_You’d better take something to read when you go to see the doctor_______ you have to wait.
#80049
A
even if
B
in case
C
as if
D
in order that