Maria has _____ trouble _____ math, so she often asks her math teacher for help.A.much, understandingB.many, understandingC.not, to understand
Look! The reporters are covering these lively actresses’ wonderful performance_______.
While I_______ a detective story, someone_______ at the door.
The teacher didn’t leave the classroom building until the papers _________ in the end.
His sister wanted to have him _____ the radio, but he had had it _____ already.
—Why not go camping this weekend? —_______.