【推荐1】This made Hannah very sad, and even more __________(determine) to do something. (所给词的适当形式填空)

【推荐2】Past studies have shown a link between sleeping less and weighing more, but scientists have had difficulty ___________(determine) “which came first, the chicken or the egg？” says Julie Lumeng of the University of Michigan in Ann Arbor. (所给词的适当形式填空）

【推荐3】___________ (determine) to make his fortune in South America, he set off from his home for New Orleans.

【推荐1】单句语法填空
1. _____wasn't until we had stayed together for a couple of weeks that I found we had a lot in common.
2. _____much homework did we have to do that we had no time to take a rest.
3. It was only when the car pulled up in front of our house____we saw Lily in the passenger seat.
4. Try____he might, he could not come up with an idea for his mother’s Christmas gift.
5. Bach died in 1750, but it was not until the early 19th century____his musical gift was fully recognized.
6. The old lady lives in the woods, at the edge of which____(lie) a clear lake.
7. _____you be fired, your medical insurance and other benefits would not be immediately cut off.
8. Jane won’t join us for dinner tonight and Tom won’t_____.
9. Not only____the nurses want a pay increase, they want reduced working hours as well.
10. _____(be) there no modern telecommunications, we would have to wait for weeks to get news from around the world.

【推荐2】I'm sorry.________it not been for my illness，I would have come and lent you a helping hand. (用适当的词填空)

【推荐3】We would have won if we ________(run) out of energy.   (所给词的适当形式填空)