根据对话内容，从对话后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

A: Hello, this is Lucy speaking. Is that Li Wei?

B: Hi, Lucy!   小题1:  We are expecting your coming.

A: Thank you! My plane leaves Beijing this afternoon.

B:   小题2:

A: It’s CA1409.

B: OK, CA1409.   小题3:

A: At 3:30 in the afternoon.

B: Leaves at 3: 30, and arrives …

A: It arrives at 6:10, and I will have to wait some time for my luggage（行李）.

B: All right.   小题4:

A: Thanks a lot.   小题5: 

B: I’ve ordered a room for you in the centre of the city near my home.

A: Wonderful! See you then! 

B: See you!

A．When does it take off?

B．How about my hotel?

C．When does it arrive?

D．What’s your flight number?E. Li Wei speaking.

F. Who will meet you?

G. I’ll wait for you at the gate at 6:30.

生产过程中的( )、( )是解决毒物危害的根本途径，采用( )是从根本上解决毒物危害的首选办法。

A．密闭化；机械化；无毒或低毒物质代替有毒或高毒物质

B．密闭化；自动化；无毒或低毒物质代替有毒或高毒物质

C．机械化；自动化；安全防护设施和个人防护用品及报警装置

D．机械化；电气化；安全防护设施和个人防护用品及报警装置