Time waits for no man. But teenagers won’t realize the value of time until it’s gone. Don’t waste your time, __________ you will regret it.
| A．so | B．and | C．but | D．or |
Don’t lose heart _________ you fail.
| A．until | B．as if | C．unless | D．even though |
It was in the street_________ I met Mary yesterday .
| A．that | B．when | C．where | D．what |
“You can’t catch me!” Janet shouted, __________ away.
| A．run | B．running | C．to run | D．ran |
---What can I help you, sir?
--- I’d like to have this watch_______.
| A．to be repaired | B．repair | C．repairing | D．repaired |
To test eggs , ___them in a bowl of water: if they float they are bad; if they sink they are good.
| A．put | B．putting | C．to put | D．to be putting |