The split between humans and living apes is thought by some scholars ____ 15 to 20 million years ago.
#96013
A
to occur
B
occurring
C
to have occurred
D
having occurred
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However, the eruption itself is really exciting and I shall never forget my first sight of one.
#95013
A
to watch
B
to be watched
C
watched
D
watching
__________ the housing price, several measures have been adopted in the last two years.
#92758
A
Lowering
B
Having lowered
C
To lower
D
To have lowered
______at in this way, the present situation about birds flue doesn’t seem so disappointing.
#98888
A
Looking
B
Looked
C
Having looked
D
To look
In April, thousands of holidaymakers remained ________ abroad due to the volcanic ash cloud.
#94793
A
sticking
B
stuck
C
to be stuck
D
to have stuck
.We consider__________the Great Wall this summer holidays.
#96826
A
to consider
B
visit
C
to be visiting
D
visiting