( )1. I don’t know ________ my uncle will come tomorrow. ________ he comes, I’ll call you.
A. if; Because B. whether; Before
C. if; That D. if; If
( )2. Your Chinese teacher is a young lady ________ comes from Beijing.
A. who B. which C. whom D. whose
( )3. —Do you know ________ ?
—Sorry, I don’t know.
A. where does Maria’s mother work
B. where Maria’s mother works
C. how does Maria’s mother work
D. what does Maria’s mother do
