Overpopulation is a terrible threat to the human race.Yet it is probably ____ a threat to the human race than environmental destruction.
A.no more | B.not more | C.even more | D.little more |
He pretended _______ when his mother stepped into his room.
A.to study | B.studying |
C.to have studied | D.to be studying |
Johnny, you ______ play with the knife; you _____ hurt yourself.
A.wont; cant | B.mustn’t; may |
C.shouldn’t; must | D.cant; shouldn’t |
Since 1949, the peoples living standard _______, causing a big _______ in population.
A.has been raised; rise | B.has been rose; raise |
C.has raised; rise | D.has raised; rose |
______ has already been pointed out, grammar is not a set of dead rules.
A.As | B.It | C.That | D.Which |
There is a mountain ________ the top is always covered with snow.
A.of that | B.of which | C.whose | D.that |