______ it have been the failure to pick up directions from the ground control that caused the air crash?
| A．Must | B．Could | C．Would | D．Should |
______ children believe they can succeed, they will never become totally confident．
| A．If | B．Since | C．Once | D．Unless |
Napoleon is famously said ______, "When China wakes, it will shake the world．"
| A．to declare | B．declaring | C．to have declared | D．having declared |
I hope there are enough books for each student to have ___________.
| A．it | B．those | C．one | D．them |
Bill always seems so confident, but ________ he’s extremely shy.
| A．in vain | B．in contrast | C．in reality | D．in surprise |
A______roadgoes______fromoneplacetoanother.
| A．straight,straight | B．straightly,straightly | C．straight,straightly | D．straightly,straight |