A healthy life Period 6 Summing Up，Learning Tip and Assessment
7.tom's mother kept telling him that he should work harder，but______ didn't help.
a.it b.he
c.she d.which
8.i don't think______ possible to master a foreign language without hard work.
a.this b.that
c.its d.it
9.jessica heard a terrible noise，______ brought her heart into her mouth.
a.it b.which
c.this d.that
10.is______ necessary to complete the design before the weekend?
a.this b.that
c.it d.he
11.______ will be good to do some exercise every morning.
a.it b.there
c.those d.you
12.we think ______our duty to pay taxes to the government.
a.that b.this
c.its d.it
13.______ four years since i joined the army.
a.it was b.there is
c.it is d.there was
14.______ appears to me ______ the report must be true.
a.that；it b.it；that
c.it；it d.that；that
15.the climate of shanghai is better than ______of paris.