— [u]      [/u] is an orange?— It's [u]      [/u] orange. 未知类型：{'label': 'questionDesc', 'content': '请选择正确答案。', 'isMemberControl': 0, 'type': 181} A: What, an B: What color, an C: What color, \ D: What, a

[u]      [/u] hard work he was doing! A: What B: What a C: How D: How a

He was so angry at all [u]          [/u]  was doing   [u]            [/u]  he walked out. 未知类型：{'label': 'questionDesc', 'content': '请选择正确答案。', 'isMemberControl': 0, 'type': 181} A: that; that B: what; that C: that; what D: which; what

— [u][i]         [/i][/u][i] [/i]is your pen?— It's [u]      [/u] . 未知类型：{'label': 'questionDesc', 'content': '请选择正确答案。', 'isMemberControl': 0, 'type': 181} A: What; blue B: What color; blue C: What; blue color D: What color; blue color

How many back vowels are there in English? What are they? 6, and they are /u:/, /u/, /ɔ:/, /ɔ/, /ɑ:/ and /ʌ/.

A、4080B、4000C、4D、408

— [u]             [/u] honest boy you are! —Thank you! 未知类型：{'label': 'questionDesc', 'content': '请选择正确答案。', 'isMemberControl': 0, 'type': 181} A: What an B: What C: How an D: What a

$u$, $v\in E^3$, $u=(0,-1,1),v=(1,-1,-1)$. What is $||u \times v||^2$:<br/>______

$u$, $v\in E^3$, $u=(0,-1,1),v=(1,-1,-1)$. What is $\langle{u,v}\rangle$:<br/>______

[u]          [/u] the flight to New York will be delayed is  [u]           [/u] I'm especially worried about. 未知类型：{'label': 'questionDesc', 'content': '请选择正确答案。', 'isMemberControl': 0, 'type': 181} A: If; what B: Whether; that C: When; that D: Whether; what