So______ that most parents are too worried to let their kids travel alone at the beginning of the new term.
(2013·安徽卷)It be the vocabulary that caused you the problem in the exercise because you know a lot of words.
— What are you doing this Saturday? — I’m not sure, but I go to the Rolling Stones concert
— It rained cats and dogs this morning. I’m glad we took an umbrella. — Yeah, we would have got wet all over if we _______.
No one _____ be more generous; he has a heart of gold.
If he had spent more time practicing speaking English before, he _____ able to speak it much better now.