( ) Do you know ________ this word?
A. what to spell
B. how to spell
C. to spell
( )（5） Do you like _______?
A. singB. singsC. singing
( )（4） Where ____ you from ?
A. isB. areC. do
( )（3） Let _____ begin our class .
A. isB. areC. do
( )（2） — Welcome to our class ! — _______________.
A. Hello .B. Sorry !C. Thank you !
( )（1） We have two new friends _____ our class .
A. atB. onC. in