If you cannot have a good command of grammar as well as precise usage of each word you’ve learnt, it is ________ for you to use English flexibly

No wonder he looks tired! He’s been studying for the exams all week, ____ he’s been working in a bar at night

So difficult ________ it to live in an English-speakingcountry that I was determined to learn English well

The good news makes us very ________________.

Mike is said to have fallen in love with Jane. —______ he reminded me so much of her.