______you are always optimistic and self-confident, I can’t wait to make friends with you

The policy(政策) that the Chinese government stuck to _____correct.

What do you think of the girl— She’s shy. She can’t even express herself __________ in public.

Shall we go for a picnic in the forest park tomorrow—Yes, ________ it rains heavily.

When_________why he was late, he made no answer.