—Oh, my God! I can’t find my key to the office.
—Don’t worry. Perhaps it______________ in your home.
A. left B. has left C. was left
There50 students in our class.
| A．be | B．is | C．am | D．are |
I havenew basketball，,Let’s playfootball.
| A．a a | B．an a | C．an,/ | D．a / |
Welcome the Americansour city.
| A．at | B．in | C．to | D．/ |
—Harbin is really a beautiful city and there’re many places of interest.
—So it is. Why not stay here for ____ two days?
| A．other | B．others | C．another | D．more |
China is an ____ country.
| A．European | B．Asian | C．American | D．African |