French language Q&A Forum

I have done the test several times still have mistakes in adjectives. 

One of the sentence does not make sense for me or let us say could not understand what does it mean,

un orge grand comme une maison,

if I consider grand irregular adjective and commes before maison but the answer was wrong ! Can you help me understand why it is wrong and what does this sentence mean in English.

merci beaucoup

The quiz says: "Lucas a monté la nouvelle armoire de sa soeur: means.

The 2 answers expected were:

1. Lucas assembled his sister's new wardrobe.

2. Lucas took his sister's new wardrobe upstairs.

But the French does not specify the location so the translation can only be "Lucas took his sister's new wardrobe up" - not upstairs. Perhaps it was up a ramp or a hill. Since that translation was not offered surely only the one answer should be allowed.

The quiz says: ____ les gars! Thanks for coming guys!

The answer is Merci d'etre venus

This is clearly correct in the usual situation where the guys have come and are being thanked for it.

But suppose that the guys had promised to come and were being thanked in advance for it? The same English sentence would work for that situation, even if it would be more explicit if we said "Thanks for agreeing to come, guys". How would the French look in that case?