“But years of ____________ (observe) of geochemistry have taught me that caution is wis
Jet belts and rocket belts were developed ______.
A.20-30 years ago
B.50 years ago
C.recently
D.30 years ago
It ______ ten years since you left me.
A.has
B.had been
C.was
D.is
A.that
B.which
C.what
D.where
The story ______ many years ago. ()
A.take place
B.took the place
C.took place
D.happen
What was not allowed years before? ______.
A.The selling of strong spirits
B.Smoking
C.The selling of drinks
D.Drinking in the public
During the past years the ______ of automobile accidents in New York City has decreased.
A.degree
B.quantity
C.number
D.amount
A.A.profoundly
B.B.deeply
He remembered ______ in this school when he was ten years old.
A.teaching
B.being taught
C.to teach
D.to be taught
New ideas sometimes have to wait for years before ______.
A.fully accepted
B.fully accepting
C.being fully accepting
D.having fully accepted
I _______ here two years ago.
A.moved to
B.have moved
C.have moved to
D.moved