—Happy birthday, Mary!
—Thank you! It’s the best present I         for．

It was so nice of you to come to our aid. I don’t think we ______ it without you.   

I ______________ have passed my examination easily，but I made too many stupid mistakes．

—What a pity! Their experiment is a failure.
—They ________ better under more favorable conditions.

As is required by their employer, the employees ______ finish the project within this month.

–I don’t know what I _______ without the suitcase you lent me.
–Glad to have been of some help to you.

The maths teacher demanded that all the students _______ the examination paper within one and a half hours.

--- Mary, what are you up this weekend?
--- Not sure. Tom just suggested that we _______ camping if it is sunny.

--- Jack fell off the ladder yesterday, but he is all right now.
---What a lucky dog! He _________ himself badly.

We were strongly recommended that we _____ in Malaysia.