Question

share of world gdp by country (2011)
the single country with the worlds largest gdp is
the us
the member countries of the european union have about the same gdp as
the us
together, these four countries and the european union have

half of the worlds total gdp.
less than
more than

Explanation:

Step1: Analyze the first blank

From the pie chart, the US has a 21% share of world GDP. We check other single countries: China (11%), Japan (8%), India (3%). So the US has the largest GDP among single countries.

Step2: Analyze the second blank

The US has 21% GDP share. The European Union has 25% GDP share. Since 25% > 21%, the EU's GDP is more than the US's.

Step3: Analyze the third blank

Calculate the total of the four (US:21%, EU:25%, China:11%, Japan:8%, India:3%? Wait, the four countries here? Wait, the four: US (21%), China (11%), Japan (8%), India (3%)? No, wait the pie chart: US (21%), EU (25%), China (11%), Japan (8%), India (3%), All others (32%). Wait, the question says "these four countries and the European Union" – wait, maybe US, China, Japan, India and EU? Wait, no, let's recalculate: US (21) + China (11) + Japan (8) + India (3) + EU (25) = 21+11=32, 32+8=40, 40+3=43, 43+25=68. Wait, no, maybe the four countries are US, China, Japan, India? Wait, no, the EU is a union, not a country. Wait the question: "Together, these four countries and the European Union" – maybe the four countries are China, Japan, India, and another? Wait no, the pie chart has US (21%), EU (25%), China (11%), Japan (8%), India (3%), All others (32%). So if we take US, China, Japan, India, and EU: 21 + 11 + 8 + 3 + 25 = 68. Half of 100 is 50. 68 > 50, so they have more than half.

Answer:

1. the US
2. more than
3. more than