We needn't / may not / mustn't pay to get in because it's free.

13. Some UFO sightings (not explain) ___________________________ explain them easily. No one is able to explain them easily.

There ______________ a new law to protect endangered species if we don't want them to disappear from the earth. A. must to be B. needs to be C. might be D. may be

12. Try to speak slowly when you give your speech, if you do not, some of Your words (misunderstand) _____________________________

15. Susan (not hear) ___________________ the speaker because the crowd was cheering so loudly.

The weatherman on the news said there's a storm north of here and it (rain) _____________________ later on this afternoon.

I've no idea where Jane is. She could be / must be anywhere!

He is wearing a gold ring on his fourth finger. He (marry) ________________________

The entire valley (see) _____________________ from their mountain home.

According to our teacher, all of our compositions (write) ______________________ ink. He won't accept papers written in pencil.

10. Your daughter has a good voice. Her interest in singing (encourage) ______________________

Look at those clouds. I think it can / might / must rain.

I'm not sure. I must not / may not be able to get there in time.