Cats ________ be quite friendly towards humans, but they live mysterious lives of their own.
A.need B.must C.shall D.can
A number of new machines were introduced, ________ an increase in production.
A.resulted in B.to result in C.resulting in D.will result in
The library will be built ________ there used to be a factory.
A.at which B.when C.where D.as if
In the hills there is a mysterious dark lake, ________ has never been measured.
A.the depth of it B.whose depth
C.its depth D.the depth of whom
Women officers ________ 10 percent of the police force in this city.
A.fill up B.bring up C.use up D.make up
The students poured out of the teaching building, with the school ________.
A.to finish B.having finished C.finishes D.finished
