— The woman biologist stayed in Africa studying wild animals for 13 years before she returned. — Oh, dear ! She ______ a lot of difficulties !
The teacher asked us to put weekends ______ good use.
______ the two oceans the Pacific is ______.
Only when _____ the painting _____ decide whether the painting is worth buying.
Staying up is bad _____ you , but getting up early is good _____ your health.
I haven’t got any paper _____.