They had a pleasant chat _____ a cup of tea.

The traditional approach ________ with complex problem is to break them down into smaller,
more easily managed problems.

短文改錯(cuò)
       此題要求改正所給短文中的錯(cuò)誤。對(duì)標(biāo)有題號(hào)的每一行作出判斷：如無(wú)錯(cuò)誤，在該行下邊橫線上畫一個(gè)勾;如有錯(cuò)誤(每行只有一個(gè)錯(cuò)誤)，則按下列情況改正：
        此行多一個(gè)詞：把多余的詞用斜線(\)劃掉，在該行下邊橫線上寫出該詞，并也用斜線劃掉。
        此行缺一個(gè)詞：在缺詞處加一個(gè)漏字符號(hào)，在該行下邊橫線上寫出該加的詞。
        此行錯(cuò)一個(gè)詞：在錯(cuò)的詞下劃一橫線，在該行下邊橫線上寫出改正后的詞。
        注意：原行沒(méi)有錯(cuò)的不要改。
     An old friends of mine from Beijing telephoned from                      1.________
the airport to tell me that he has arrived. I was still at the                     2.________
office at that time. I told him which my house was and that                  3.________
I had left the key under the doormat. I asked for him to                      4.________
make him at home. Two hours later, I telephoned him.                        5.________
He told me he couldn't find the key under the doormat, and                6.________
he  had no difficulty in entered my house, because the                         7.________
window of my living room was just by the apple tree, and                   8.________
he had climbed in. I was surprised. There has no                                9.________
apple tree in front of my living room, but there is
one on front of my neighbour's.                                                          10.________

Mr Song is ______ our school，that is to say，our school is ______ Mr Song.

Einstein is known _________ a great scientist.