Research suggests that fast food and soft drink directly _________ to childhood obesity.

Doubting that the traveler carried drugs, the Customs officer stopped him and _______ his suitcase, but found nothing at all.

Those who suffer from the headache will find they get ________ from this medicine.

Though________money, his parents managed to send him to university. 

—Jimmy, had a lot of parties recently.—Yes, that might _____ his failure in the examination.