Why is a “secondary succession” quicker?




A.The ground is more suitable.
B.There’s more space for fewer plants.
C.It is supported by the forest
D.Birds and animals bring new seeds.

According to the author, mixed-ability teaching is more preferable because ______.




A.formal class teaching is appropriate
B.it aims at developing the children’s total personality
C.children can learn to work with each other to solve personal problems
D.it doesn’t have disadvantages as in streaming pupils

____________(27)




A.research
B.stimulus
C.concern
D.impatience

It can be inferred that flood plains, deltas, and stream channels are similar in which of the following ways?




A.Rapid sedimentation in such locations makes it difficult to locate fossils.
B.Such locations are likely to rich sources of fossils.
C.Fossilized human remains are only rarely found in such locations
D.Animals rather than plants have been preserved at such locations.

Try something sharp-smelling under her nose, that might __________ if she ‘s still unconscious.




A.get her over
B.put her forward
C.calm her down
D.bring her to

Nothing ___________ I do seems to please her.




A.which
B.that
C.who
D.whom

The preparations __________ by the time the guests __________.




A.had been finished/ arrived
B.have finished/ arrived
C.had finished/ were arriving
D.have been finished/ were arrived

__________ the book, please return it to me.




A.Should you find
B.Will you be finding
C.Will you find
D.Will you have found

“I am sorry you failed the examination”. “Frankly, I wish I ___________ harder”.




A.studied
B.had studied
C.was studying
D.did study

A.invite
B.open
C.divorce
D.begin