has
is
have
are
第1题:
It is always interesting to visit another country, especially for those who have never traveled a great deal. Foreign ____ can be very educational for anyone if he is interested enough to make preparations beforehand.
:A、travel
B、country
C、language
D、people
第2题:
A、has
B、has being
C、have
D、be
第3题:
A.living
B.live
C.alive
D.lived
第4题:
There are various kinds of metals, each () its own properties .
A、has
B、had
C、to have
D、having
第5题:
A、sociologist has
B、sociologist is
C、sociologists have
D、sociologists are
第6题:
A. a, has
B. /, has
C. a, have
D. a, had
第7题:
A、be
B、is
C、are
D、been
第8题:
A.has so much been done
B.have so much been done
C.has been done so much
D.so much have been done
第9题:
If there __________ no air, people would die.
A、were
B、is
C、be
D、been
第10题: