Could you please give me a hand? I can't complete the task on time ________ your help.
A.after B.besides C.during D.without
What good news! They will build a bridge ________ the river in front of my house.
A.across B.through C.over D.under
The children are playing the hide and seek. Jack is hiding himself ________ a box.
A.in B.on C.over D.through
My grandpa used to know the world ________ the radio. Now he can get more information about our society on the Internet.
A.on B.by C.in D.with
Be careful when you cut vegetables ________ the knife, or you may hurt yourself.
A.with B.at C.on D.for
I am looking after Tom now. He has had a fever ________ 8：00 this morning.
A.at B.since C.for D.till
