The split between humans and apes is believed by scientists______15 to 20 million years ago.
#90155
A
to be occurring
B
having occurred
C
to have occurred
D
to occur
推荐题目
---“The last one ____ will pay for the meal.” ---“Agreed!”
#90604
A
to arrive
B
arrived
C
arriving
D
arrives
（湖南省怀化市2014年高三第二次模拟考试）23. Mr. Smiths was busy writing a story, only ______ once in a while to smoke a cigarette.
#88410
A
to stop
B
to have stopped
C
being stopped
D
stopping