-------Look at that man! Is he your math teacher?
-------Yes, .
| A．he isn't | B．he is | C．she isn't | D．she is |
( ) If I ____ you tomorrow, I will give you the receipt.
A. see B. will see C. am seeing
( )—— What day is today? —— It's _____
A. Monday B. a fine day C. September 1st
( )The students couldn't help ______ when they heard the joke.
A. to laughB. laugh C. laughing
( ) Do you know ______ this word?
A. what to spell B. how to spell C. to spell
( ) Be quiet! The babies ________.
A. sleep B. are sleeping C. slept