Mothers holding jobs outside the home should have _______ schedules to make it easier to care for their children.
A．heavy B．smooth C．flexible D．complex
We lost our way in that small village, otherwise we ________more places of interest yesterday.
A．visited B．had visited
C．would visit D．would have visited
Had it been possible I would have gone to the movies, but I ________________ busy.
A．had been B．am C．was D．would be
In some developed countries, larger population is ______________ in their big cities.
A．approved B．gathered C．concentrated D．fixed
Accurately, my granny has got no hobbies at all ______ you think watching TV as one.
A．if B．while C．after D．unless
A person ________ with H7N9 viruses will be more likely to die of lung dysfunction.
A．developed B．infected C．injected D．progressed
