问题

Remember to do this in time of H1N1 — constantly the windows to let fresh air enter and move around inside, and avoiding the access to the crowds, a necessity everyday.

A:open
B:we open
C:opening;
D:to open

正确答案是：

同类题型

After graduating from university, Jack decided to go to the UK for further .

His talk was nothing but milk and water. “milk and water” here means________.

下列各句中，表达得体的一句是

For more information about Britain’s most successful football manager—Sir Alex Ferguson, ________ the book25 years at Manchester United.

She ________ Robert for a year.[ ]