We were swimming in the lake _______ suddenly it began to rain heavily.
| A． when | B． while | C． until | D．before |
Though he failed many times in election, he never lost______ heart and at last he was elected_______ President of the USA.
A. the ; a B. a ; the C. his; the D. / ; /
He______ his work, otherwise, he wouldn’t be enjoying himself by the seaside.
| A．must have completed | B．should have completed |
| C．ought to complete | D．must complete |
Mark Twain _____ along the Mississippi River, which was _____ to his writing.
| A．was grown up / benefit | B．brought up / benefit |
| C．grew up / of beneficial | D．was brought up / beneficial |
___ in London, the penniless American wandered on the pavement, ___ to find a job to make a living.
| A．Lost; hoped | B．Losing; hoped | C．Lost; hoping | D．Losing; hoping |
---Are you coming to Betty’s wedding?
---I’m not sure. I ______ go to Beijing on business that day.
A. must B would C. should D. might