Some problems ___ in the lecture by Mr.Smith are very popular in our school, such as the waste of electricity, water and food, etc...
#74324
A
referring
B
referred to
C
referring to
D
were referred
推荐题目
Victor apologized for _________ to inform of the change in the plan.
#65227
A
his being not able
B
his not being able
C
him not to be able
D
him to be not able
There______ a number of natural mysteries in the world that even make scientists ______.
#76672
A
exists; confusing
B
are existed; confused
C
exist; confused
D
exist; confusing