A. So B. However C. Luckily D. Then

【题目】I don't know ______ tomorrow. Can you tell me?
A.when we started
B.when did we start
C.when we will start
D.when will we start

A. are fourty B. is forty C. is fourty D. are forty

A. in B. on

C. at D. with

【题目】We found _____ necessary to protect the environment.
A.it
B.this
C.that
D.what

【题目】— When were you born?
— I was born ______a cold winter morning _____1994.
A.in; in
B.at; on
C.on; in
D.of; of

【题目】I saw a ________ boy playing football in the garden.
A.ten years old
B.ten-years-old
C.ten-year old
D.ten-year-old

A. a , the B. an , / C. an , the D. / , the

【题目】Tim began to play _____ violin when she was four years old.
A.the
B.a
C./
D.an

A. in B. at C. on D. for