How _____ pieces of paper _____there on the desk?[ ]

_________is very interesting to swim in the river in summer, but it’s dangerous.

Will you please write a short passage on “Meteor Garden” and_____ it to me this evening? —What about tomorrow? My computer doesn’t work okay now.

Hello, can I speak to Huang Yi, please?—Sorry, we don’t have ______________Huang Yi here, you dialed a wrong number.

Look at my new digital camera. I bought it ______ October 1, National Day. —Wow, how nice! [ ]