分层限时跟踪练
Ⅰ.单句语法填空
1．The famous doctor is going to set out to_perform (perform) the operation，so please keep calm.
2．If you haven't read this book，please don't pretend to_have_read (read) it.
3．Chinese traditional landscape paintings try to show harmony between man and nature while oil paintings attach more importance to humans.
4．After months of unemployment all he asked for was a chance to_earn (earn) his bread.
5．Chocolate is very sensitive to changes in temperature and humidity.
6．Mr.White，who comes from a European country，has_formed (form) the habit of attending church on Sundays.
