—Do you know the girl          is from Canada?

—Yes, her name is Helen.

A. whom          B. which            C. whose        D. who

 You shouldn’t borrow others’ bike _________ permission.

A. without                B. with                   C. haven’t            D. hasn’t

 He doesn’t know _________.

A. to do what            B. to do how           C. what to do      D. how to do

 Air pollution ________ from many ________ sources.

   A. is coming, differ                          B. comes, different

C. is coming, difference                       D. comes, differences

What do wee need ________ to protect our environment?

   A. to do          B. to             C. do             D. doing

 If we use fewer chemicals called CFCs, the ozone layer will be ________.

   A. protected      B. damaged     C. destroyed     D. threatened

 Look, he is good at swimming, ________ a fish in the water.

   A. for            B. with          C. like             D. seem

 My mother often asks my father _________ too much. It’s bad for his health.

    A. doesn’t smoke  B. not to smoke  C. not smoke        D. not smoking

We should change our habit of using plastic bags, and then we can ________ our earth.

A. damage      B. destroy       C. threat            D. protect

---I think my coat _______ yours, isn’t it?

   --- Yes, you’re right.

   A. similar to     B. the same as    C. different from     D. familiar to