Look，the boss is very angry with Alex．
Well，he came late again．But that's no______ to shout at him．（ ）
A．problemB．lessonC．excuseD．Reason
Is that Tom over there？
It _____ be him． He is on the plane to Chengdu now．（ ）
| A． |
can't |
B． |
might not |
C． |
must |
Sally's favorite _____ is orange．
I see．That's why all her sweaters are orange．（ ）
| A． |
fruit |
B． |
color |
C． |
juice |
That's the boy ____ won the first prize in the competition yesterday．（ ）
| A． |
who |
B． |
which |
C． |
whom |
We all look forward to ____ you again soon．（ ）
| A． |
see |
B． |
seeing |
C． |
seen |
Do you know ____ ？（ ）
| A． |
how old is he |
| B． |
how old he is |
| C． |
he is how old |