— The woman biologist stayed in Africa studying wild animals for 13 years before she returned. — Oh, dear ! She ______ a lot of difficulties !
She had a bad cold, but luckily began to _______ soon.
Everyone was trying to ________ a better idea to persuade him to stay.
Use your head, _______you’ll work out the problem.
_______ is known to all, Lu Xun was famous as a great thinker.
I would appreciateback this afternoon.