—Do you think the first problem in this math test difficult?—Yes.I could work it out.
___students will take part in the sports meeting and _____them is over three hundred.
I ______ some coffee _____ any sugar.
---What do you think of your brother . ----He is ___honest and _ useful man.
No one knows ______ in the future, so take care of what we have now.
I'm a singer is a program ______ is enjoyed by people of different ages.