[ Past Tenses ]
Twelve US astronauts … on the moon since 1969.
A. have walked
B. didn’t walk
C. walked
D. has walked

Random Topics:
So....that... Such.......thatModal VerbPreposition of TimeAdjectives, ING - EDPast Perfect Simple & ContinuousGrammar Like & Linking VerbConditional Sentence 0, 1Must / must notPresent Simple QuestionsFuture FormsOther quiz:
Grammar › ViewOur boss made us _____ extra hours.
A. to working
B. working
C. work
D. to work
Grammar › View
“When will this exercise end?”
A. He asked when that exercise would end.
B. He asked when this exercise will end.
C. He asked if this exercise would end.
D. He asked if this exercise will end.
John and Magda ____ (not/speak) to each other ____ five days.
A. haven`t speak/ since
B. haven`t speaken/ for
C. haven`t spoken/ for
D. hasn`t speaked/ since
Tenses › View
Danny …… Mt. Fuji eight times by November 10.
A. will climb
B. will have climbed
C. climbed
D. would climb
E. has climbed