____ did you _____ last night? I ate a hamburger.
A:What, ate
B:What, eat
C:When, eat
____ Al+____MnO2=____Al2O3+____Mn该反应属于基本反应类型中的____反应,在反应中,MnO2被____,Al是____剂.
方程23+x=40的解是____。
The underlined part in the word “ suggestion” pronounces _______.