Many students ________ chances to show themselves in class because the class size is too big.

To make sure the relics in the museum are well-preserved Tibet’s cultural preservation institutions have _____ modern technologies to monitor the conditions of the relics. [ ]

Why are you late， Jim—Because there a lot of traffic when I came here.

I’ve had a stomachache for two weeks. — You ____ to the doctor when it started. [ ]

Mum, I don’t know if Honghong to my party tomorrow.—I think she will come if she free.