Has Jack solved the difficult math problem?
Not yet. But I believe he_____in a few minutes.( )
A.has worked it outB.will work it out
C.was working it outD.works it out
Our teachers often tell us how to teach _____( )
A.themselvesB.ourselvesC.yourselves
I think eating ____is good for health ( )
A.tomatoesB.bananaesC.egges
I find___pen on the ground.Whose is ___pen?( )
A.a,theB.the,aC.a,a
Frank knows much about the city because he ______ there many times.( )
A.wentB.has goneC.has been
Could you please tell me _________?( )
A.where does he liveB.where he lives
C.where he live