16．—Bob, you look so happy today!
—Well，I got ______ A on my English test．
A．the B．a C．an D．/
17．I have a．______ for breakfast everyday.
A．hot dog B．cookie C．dumpling D．hamburger
18．--Whose shirt is this? Is it Tom's?
---No, it isn't, ______ is white.
A．Mine B．Hers C．His D．Yours
19．---I'm ______, mum. Can I have something to drink?
---OK. Here's some cola.
A．full B．heavy C．hungry D．thirsty
20．—When did the Shanghai Expo open?
—_______May 1st, 2010.
A．In B．On C．At D．By