to spell every word right.
举一反三
- ______ (Does / Do) he know how to spell the word?(提示：spell的意思是拼写。）
- Do you know ____this word？A,what to spell, B, how to spell, C, to spell（） A: 否 B: 考查疑问副词和动词不定式的连用 C: 否 D: 否
- 函数$z=\arcsin\dfrac{1}{~\sqrt{x+y}~}$的定义域为( ) A: $\left\{(x,y)\left|~x+y\geq<br/>0\right.\right\}$; B: $\left\{(x,y)\left|~x+y\geq<br/>1~\text{或}~x+y\leq<br/>-1 \right.\right\}$; C: $\left\{(x,y)\left|~x+y\geq<br/>1\right.\right\}$; D: $\left\{(x,y)\left|~x+y\geq<br/>\dfrac{4}{~\pi^2~}\right.\right\}$．
- Spell the following word： s_______ _: (adj.) one that takes the place of sb. else
- He has to check the (spell)________ of a difficult word before he uses it.