My friend Jennifer, ____ help I’ve made great progress in my studies, will leave for Canada next week.

Keeping ______ hours does good to your _______.

Some people believe that English is one of the most important subjects for us students.–It _______ . But things seem to be changing in recent years.

Hi, have you found your lost watch—Not yet, I have looked for it everywhere, but I still haven’t found it.

If nothing______, the oceans will turn into fish deserts.