Experts think that________recently discovered painting may be________Picasso.
(2011·浙江，2)
| A．the；/ | B．a；the |
| C．a；/ | D．the；a |
--- What did he say? ---- He said he ________ the sentence in his own words.
| A．was considering to explain | B．considered how to explaining |
| C．would consider to explain | D．was considering explaining |
I have no doubt in my mind______ they will be glad to see me.
| A．if | B．whether | C．that | D．about |
Eric received training in computer for one year, _______ he found a job in a big company.
| A．after that | B．after it | C．after which | D．after this |
With the help of high technology, many new substances（物质）______in the past years.
| A．discovered | B．have discovered | C．had been discovered | D．have been discovered |
______ is know to us all, good friends ______ happiness and value to our life.
| A．It; add | B．As; add up | C．It; add up | D．As; add |