With the loud noise going on in the workshop, I can hardly on my lessons．
A．put B．rely C．concentrate D．center
At first, it seemed that everything went well, but all of sudden, the ship hit _________ iceberg．
A．a; an B．a; the C．the; the D．/; an
Bob and Tom have nothing in ______ at all ．How can they be good friends ?
A．total B．common C．similar D．particular
They all wanted to stop working because they were tired, but of them would say so．
A．any B．some C．none D．neither
_________ the flight to New York will be delayed is _________ I’m especially worried about．
A．If; what B．Whether; that
C．When; that D．Whether; what
Only by imagining and creating ____the problem．
A．can solve B．you can solve
C．solve D．can you solve
