I. 单项选择（20分）
1. Every day my mother tries her best to keep our house clean and tidy ______ tired she is.
A. however B. whenever
C. whatever D. wherever
【解析】选A。句意：每天我妈妈尽力保持房子的清洁和整齐，不论她多么累。however=no matter how意为“无论如何”。
2. —Mum, can you play table tennis with me now?
—Sorry, I’m busy. You can invite your father ______ me.
A. as well as B. except for
C. in place of D. along with
【解析】选C。as well as与……一样，except for除了……之外，in place of代替，along with与……一道；与……一起。句意：——妈妈，你能和我打乒乓球吗？——我太忙了，你可以邀请你爸爸代替我。
