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
 Tom enjoys          the radio.
#54007
A
listening
B
hearing
C
listening to
D
to listen
It ______ that he has been ill for a long time. 
#58101
A
seem
B
seems
C
look
D
looks