In 1942，Columbus_______ on the of the Bahama islands, but he mistook it for an island off India.
A. lands B. landed C. has landed D. had landed
．-----Tommy is planning to buy a car.
----I know .By next month, he______ enough for a used one.
A. saves B. saved C. will save D. will have saved
In the last few years thousands of films all over the word.
A .have produced B. have been produced
C. are producing D. are being produced
I'll go to the library as soon as I finish what I .
A. was doing B. am doing C. have done D. had been doing
Tom in the library every night over the last three months.
A. works B. worked
C. have been working D. had been working
—Bob has gone to California.
—Oh, can you tell me when he ?
A. has left B. left C. is leaving D. would leave
