It’s hard to say what kind of person he is. Sometimes he is very nice; at other times he _______ be very cold.

Einstein was usually hisscientific study that he even forgot to eat.

__________ these tips, and your time _______ doing research on the Internet _________ much worthwhile

Remember _____ to my daughter’s dance show nextFriday. –Of course I will. I’ll never forget _____ herdance for the first time last year.

we will build the dam has not beendecided yet, ______