—We'd better not eat too much junk food ______ it is delicious.
—I agree. It's bad for our health.
A. if B. although C. because
It has rained for almost a month in Mudanjiang. We ______saw the sun come out.
A. often B. hardly C. always
Bob asked me_ .
A. what was she doing B. what is she doing
C. what she was doing D. what she is doing
—_ did he come?
—He came to ask for help.
A. How B. When C. Where D. Why
My brother and 1 in Yinchuan since 1997.
A. had lived B. have lived C. live D. will live
We have only one Earth. It's our common _.
A. family B. house C. home D. room
