She ______ TV when I came in. A: watched B: B．was watching C: C．watching

The number of people invited __fifty， but a number of them ______absent for different reasons． A: A．were，was B: B．was, was C: C．was，were D: D．were．were

I ______ there only for one minute when the manager arrived at the station. A: have been B: B．was C: C．would be D: D．had been

19. He hurried home,never once looking back to see if he______. A: A.was being followed B: B.was following C: C.had been followed D: D.followed

We_____ more places of interest yesterday, but we lost our way in that small village. A: A．would have visited B: B．was visiting C: C．would visit D: D．had visited

I don't think you need take it too seriously. He ______ funny. A: A.was just B: B.was just to be C: C.was just being D: D.had just been

We completed one third of the project, and the loan _______ in place, we had to delay the rest till the next month. A: A．not arranged B: B．was not arranged C: C．not arranging D: D．had not been arranged

Whichtwowordsareclosestinmeaning?<br/><b>cycle</b><b>，</b><b>hawk</b><b>，</b><b>convey</b><b>，</b><b>extort</b><b>，</b><b>peddle</b><b>，</b><b>summon</b>

设A{a,b}，则P(A)×A = (   )。 A: A B: P（A） C: {<Φ,a>,<Φ,b>,<{a},a>,<{a},b>,<{b},a>,<{b},b>,<A,a>,<A,b>} D: {<a,,Φ,>,<b,,Φ,>,<a,{a}>,<b,{a}>,<a,{b}>,<b,{b}>,<a,A>,<b,A>}

以下哪段代码可以将A,B的值互换（） A: A=A^B; B=A^B;A=A^B B: A= A^B;A=A^B;B=A^B C: B= A^B; B=A^B; A=A^B D: B=A^B; A= A^B; A= A^B