一个桶的底面积为500cm²，倒入重160N的水，水的深度为30cm，则桶底所受水的压强为 ____ Pa，压力为　 ____　 N．

根据句意，用括号内所给动词的适当形式填空。(必要时加助动词或情态动词)
____ Mr Zhang ______(teach)us English three years ago.
____ Peter turned off the computer after he finished______ (write)an e-mail.
____ —Where's Miss Wang?一Look，she______(talk)with the students.
____ Mr Liu isn't here now．He______ (go)to Beijing.
____ The children will go to the zoo if it______ (not rain)this Saturday.
____ There______ (be) a meeting in our school tomorrow afternoon.
____ Mr Green______(watch)TV at this time last night.
____ You’d better______(eat)less food before you go to bed.
____ My teacher told me that light______(travel)much faster than sound.
____ English______ (speak) by many people in the world.