Can I say,<br/><br/>(a) Susan is the thinnest girl <u><b>among the three girls</b></u>.<br/><br/>(b) The coconut tree is taller than <b><u>an / the</u></b> oil palm tree. <br/><br/>(c) Mei plays badminton better than her <b><u>sister Min / her sister, Min</u></b>. <br/><br/>(d) Everyone likes to go to John's house <b><u>because is / because he</u></b> is a polite man. <br/><br/>(e) We ate / ate up the apples<b><u> all by ourselves</u></b>.(do we need to put "all by"?)<br/><br/>(f) They tended the garden / took care of the garden<b><u> all by themselves.</u></b>