—Itis usefulbook.
B
举一反三
内容
- 0
–Isthis_______pen? A: your;itis B: you;itis C: his;it’s D: her;isn’t
- 1
Itis(polite)_____________toleavethetablebeforeeverybodyhasfinishedthemeal.
- 2
Itis(simple)amatteroftime.
- 3
Nevertrytomovethatdelicatepart;itis(move)______.
- 4
Itis(certain)______truethattherewillbemorecoursestobeofferednextsemester.