The (A) world’s first electronic (B) computer was building (C) by Pennsylvania University in (D) 1946.
A.The
B.electronic
C.building
D.in

Did you notice anyone (wait) ................ outside when you left?
A.waiting
B.had waited
C.to wait
D.wait

A.geography
B.biology
C.ability
D.application

Teenagers(A) should talk (B) to (C) their parents before doing (D)some important decisions
A.Teenagers
B.talk
C.to
D.doing

A.weather
B.healthy
C.although
D.themselves

A.prepared
B.called
C.expressed
D.employed

I suppose I tend (buy) .......... more books than I used to.
A.having bought
B.to buy
C.buying
D.buy

They are talking about the ................. circles on the fields.
A.mystery
B.mysterious
C.mysteriously
D.mysteriousness

The best time to visit Spain is ............ the spring.
A.in
B.at
C.for
D.on

The longer you work, the ........... money you earn.
A.more
B.most
C.few
D.very