-- I'd like to invite you to a party tomorrow evening.
-- Thank you, but ______ I'll be free I'm uncertain.
| A．while | B．if | C．when | D．whether |
—Shall we hang out tomorrow morning?
— ________ I’ll save the morning for my homework.
| A．Sorry, I can’t make it. | B．Yes, it’s a good idea. |
| C．Well, it all depends. | D．No, that’s impossible. |
I have been in low spirits ______she left our school
| A．ever before | B．ever so | C．ever since | D．than ever |
We have to ________ the picnic because of the heavy rain.
| A．spend on | B．put off | C．put on | D．look up |
You must turn off the gas after cooking. You can never be ______ careful with
that.
| A．enough | B． too | C．so | D．very |
The car ran over a girl and her cat _____ were just crossing the road.
| A．that | B．what | C．which | D．when |