A group of middle school students spent two weeks _____ the jungle. 
#53856
A
trekking through
B
trekking across
C
to trek across
D
to trek through
推荐题目
We still don’t know what _________ while we were away from home.
#53337
A
had happened
B
was happened
C
has happened
D
happened
We’ll ___ for you outside the school gate.
#58650
A
waits
B
waiting
C
wait
D
are waiting
Robots _______ do housework instead of people in the future.
#51958
A
will be able to
B
will can
C
could
D
were able to