It’s easy the problem.
A. for him solve B. for him to solve C. of him solving D. of him to solve
The glass of water is too hot. Would you please give me some cold water ?
A. drink B. drinking C. to drink D. drunk
It takes me two hours my homework every day.
A. doing B. to do C. did D. does
I often saw the boys in the river.
A. swam B. swimming C. to swim D. swim
The father is creative enough so many nice toys for his daughter.
A. buying B. making C. to buy D. to make
Our parents often tell us not alone in the river in summer.
A. swim B. to swim C. swimming D. swam