_____healthy，you should take more exercise and eat more healthily .
A.Keep B.To keep C.Keepng
Is your father a worker ? No，but he ______.
A.used to do B.used to be C.is used to be
Then machine doesn’t work .I think it needs _____.
A. to mend B. mended C.mending
Hi，Andy.I haven’t seenyou for a long time Where______?
A.have you gone to B.have you been to C.have you been
Travelling to the moon_______several days，and the trip ___too much money
A.costs，costs B.takes,costs C. spends，pays
The accident happened _______a cold morning .
A.in B.at C.on
