It is too difficult __________( finish) the work on time.
Speak a_________! I can hardly hear you .
Reading English every day will help to improve your __________(发音)
It really improves her _______(speak)skills.
Jeff_______(study)for a math test yesterday.
I’m too busy to chat with you on QQ now. (改为复合句)
I’m _______ busy _______ I can’t chat with you on QQ now.