下列说法正确的是
| A．S02和Cl2都能使品红溶液褪色，且加热后均恢复原色 |
| B．Si02是酸性氧化物，能与NaOH溶液反应 |
| C．高温时，CuO比Cu2O稳定 |
| D．将铜片放入浓硫酸中，无明显现象，说明铜在冷的浓硫酸中发生钝化 |
Progress______ so far very good and we are sure that the work will be finished on time.
| A．was | B．had been | C．has been | D．will be |
Charles was alone at home, with_______ looking after him.
| A．someone | B．anyone | C．not one | D．no one |
It is often ______ that human beings are naturally equipped to speak.
| A．said | B．to say | C．saying | D．being said |
| A．果脯（fǔ）倾轧（yà）供不应求（gōng） |
| B．模型（mó）殷实（yīn）寡廉鲜耻（xiǎn） |
| C．宝藏（zàng）间断（jiàn） 浑身解数（jiě） |
| D．澄清（chéng）包扎（zā）相形见绌（chù） |
| A．间jiàn黑白相间亲密无间居间调停 |
| B．挨āi挨门逐户挨打受骂延挨度日 |
| C．劲jìng疾风劲草强劲有力刚劲正直 |
| D．舍shě舍我其谁不舍昼夜魂不守舍 |