______side of the street is lied with different shops, _______ of which sell electronic products.
| A．Both; both | B．Either; all | C．Neither; either | D．Either; both |
________, but the idea of having to work more than ten hours a day without weekends discouraged me.
| A．Wanting to be a teacher | B．Although I wanted to be a teacher |
| C．I had wanted to be a teacher | D．To want to be a teacher |
Green economy offers a new model ________ people could both protect the climate and develop the economy, according to what Li said at the International Cooperative Conference on Green Economy and Climate Change.
| A．how | B．why | C．where | D．which |
________in a heavy traffic jam in a taxi while you are hurrying to the airport is quite an unpleasant experience．
| A．Having caught | B．Being caught | C．Caught | D．Having being caught |
—This morning your mobile phone was always busy. I couldn’t ________ to you until several attempts.
—Oh, I’m sorry. I was discussing the price of our products with a client over the phone.
| A．get over | B．get through | C．get across | D．get on |
Many early Europeans, ________ the earth to be flat, feared that Columbus would fall off the edge of the earth.
| A．believing | B．having believed | C．believed | D．to believe |