请教几道高中英语题，要详细解析，非常感谢！

Question

1、 ，let me introduce myself to you .
A. To begin with B. Beginning with C. Begin with D. To the beginning

2、The old professor seems something serious. Don’t bother him.
A. to think of B. to have thought of C. thinking of D. to be thinking of

3、We’re glad to learn some of our products have reached world level.
A. advancing B. to advance C. advance D. advanced

4、Is this zoo we visited last year?
A. to which B. the one C. where D. that

Answer 1

ADDB
1.To begin with确实是固定搭配
2.通过后面的Don’t bother him（不要去打扰他）表示了一种现在正在进行的状态，故用现在进 行时
3.reach是个及物动词，所以后面不需要加介词to，另外，advanced就是 表示先进的意思
4.注意this zoo是做主语，故意写成疑问句来迷惑你，所以缺少中心词来做表语，we visited last year这个定语从句来强调这个动物园是去年来玩过的那个，故用the
one很适合

Answer 2

1. A
to begin with首先
2. D
seem to do, 这里要用不定式的进行式，来表示这个动作正在发生
3. D
advanced转化成了形容词，意为“先进的”
4. B.
这样的句子可以先变成陈述句 This zoo is____ we visited last year.
定语从句缺少先行词the one.在这里，the one 指代 the zoo. 再分析后面，we 主语，visited谓语，选出来的 the one是宾语。省略了关系代词which/that

Answer 3

1.A to begin with可以看做固定搭配
2.D 教授正在思考，别打扰他 用现在进行时
3.D 指先进技术用形容词
4.B visit及物不用加to，A错，B是省略了that

Answer 4

AADB