The exam was very easy, wasn’t it– Yes, but I don’t think _____ could pass it.

How was your recent trip to Sichuan—I’ve never had ________ one before

New technologies have made easier to enjoy life than ever before.

Visitors were _____at the _____pictures that the guideshowed.

Excuse me, sir. Smoking ________ in the hospital.—Oh, I’m really sorry.