They will lose the game _________they try their best.

A.unless                    B.if                        C.until

---__________do you exercise?

---Every day.

A.When                    B.How often                 C.How long

The new dining hall ________two years ago.

A.is building                B.is built                    C.was built

Look! Many people _______under the big tree.

A.is standing             B.are standing                C.standing

I found ________ easy to get on with the twins.

A.that                  B.this                       C.it

--Mum,must I finish my homework now?

--No,you ________. You can finish it this afternoon.

A.mustn’t                B.needn’t                   C.must

Linda has a swimming class ____ Friday afternoon .

A. at                     B. in                         C.on

---How carefully Tina is listening!

---Yes,he is ______ in our class.

A.the most carefully

B.the most careful

C.most careful

As Chinese,we all believe our China Dream will_______very soon.

A.come up               B.come in                    C.come true

---How many______are there in the basket?

---About fifty.

A.tomatos                B. tomatoes                  C. tomato